Just purchased, installed, and activated Netgear CMD31T modem, and 6220 router. Currently:
-Wired PC is able to connect to the internet
-Wireless devices are connected to wifi, and pulling IP address
-Wireless devices are appearing on connected list in router
-Wireless devices are able to connect to the netgear gateway administration
-Wireless devices are NOT able to connect to internet
-Issue happens on both bands, tested guest network as well, also tested secured and unsecured
-Multiple powercycles on modem and router, as well as wireless devices (Galaxy 6, Android Tablet)
-Comcast internet

In seriousness though, from the information provided (very thorough, btw) it seems as though the Wireless devices are simply being denied access beyond the network. Perhaps disconnect/reconnect the devices and punch in the passwords again. You might also check your options (depending on your OS) to see if there might be a default setting to deny wireless devices or otherwise require permission. There may also be a button on the router itself that's required to be pressed every time a new wireless device connects, sort of as a failsafe to keep outsiders from accessing your wireless. Hope something here helps.

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Ok, so tried forgetting networks are reconnecting manually, and with WPS. No luck.

As an addendum, when booting the network in proper order (modem>router>end devices) a link will not establish between modem and router. Only by booting router first, then modem, will the connection be made.

That none of those things worked AND the odd method by which you have to boot everything is really strange. I'm not sure what else to recommend other than a Google search on the matter. I would also hazard to guess that Netgear has a webpage and usually, tech product webpages include an FAQ and/or a support forum. Because unless someone else has a suggestion at this point, I'm all out of ideas, sorry Meta.

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